BIOS Error Code 38 “Shadow System BIOS ROM” – what does it mean?

Hi,
my motherboard won’t boot so I plugged in a diagnostic card. It stops at code “38”.

I was told the it’s a Phoenix BIOS. According to Phoenix’s Error-code list 38 stands for “Shadow System BIOS ROM”. I know what ROM shadowing is but what does this error message really mean? And what can I do about it?

Best regards,
Bill

ps
I’m talking about a Thinkpad T30, an IBM made laptop with a 2 GHz Pentium 4 Mobile with 512 KB onboard L2 cache memory and 400MHz front side bus.
512MB DDR1 RAM
Intel chipset:
South Bridge FW82801CAM HUB3 ICH3-M SL5YP
North Bridge RG82845MP 845MP MCH SL66J